97122731689 has 2 divisors, whose sum is σ = 97122731690. Its totient is φ = 97122731688.

The previous prime is 97122731687. The next prime is 97122731701. The reversal of 97122731689 is 98613722179.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71573906089 + 25548825600 = 267533^2 + 159840^2 .

It is a cyclic number.

It is not a de Polignac number, because 97122731689 - 2¹ = 97122731687 is a prime.

Together with 97122731687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (97122731681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48561365844 + 48561365845.

It is an arithmetic number, because the mean of its divisors is an integer number (48561365845).

Almost surely, 2^97122731689 is an apocalyptic number.

It is an amenable number.

97122731689 is a deficient number, since it is larger than the sum of its proper divisors (1).

97122731689 is an equidigital number, since it uses as much as digits as its factorization.

97122731689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 55.

The spelling of 97122731689 in words is "ninety-seven billion, one hundred twenty-two million, seven hundred thirty-one thousand, six hundred eighty-nine".